Introduction to Rongde Hall: Rongde Hall, also known as Yayuan Mansion and Military Minister's Court, was built during the Jiaqing period of the Qing Dynasty and destroyed in the late Qing Dynasty. It was the residence of Du Fang, the eldest brother of Du Shoutian's father. The main room is five rooms wide, one deep, and there are three east and west wings. It is a standard folk building in northern Shandong.